iCloud: Set up an @icloud.com email address

If you set up iCloud using an Apple ID that doesn’t end with @icloud.com, @me.com, or @mac.com, you must set up an @icloud.com email address before you can use iCloud Mail.

If you have an email address that ends with @mac.com or @me.com, you already have an equivalent address that’s the same except it ends with @icloud.com. If you use email aliases that end with @mac.com or @me.com, you also have equivalent addresses that end with @icloud.com.

On an iOS device, go to Settings > iCloud, turn on Mail, then follow the onscreen instructions.